Wordpress Search Engine Modification

I've got a WordPress site that has been heavily modified and I need a few more changes before I can bring it live. Specifically: 1. I need the built in WordPress search pulled an a Google custom search engine dropped in. It's already configured, I need the template itself modified. 2. I need a reference to a css file deleted from the primary template. 3. I need a hard-coded link changed in 2 places. 4. I need the 404 message modified (I have the text and link code already) I need this completed asap. Please only bid if you're immediately available to begin work, the site needs to launch tomorrow. Thanks!